During my stay in any hotel and in any city, whether 3, 4 or 5 stars, this is the first time I was really shocked because I was caught by a housekeeper entering my room using a staff key with the excuse that I had been called and no one answered so she just entered using her key. She was also shocked because suddenly I was standing in front of the room door because I happened to want to go to the room to get my child's swimming goggles and I ran fast because I was shocked to see a housekeeper barging into my room using a hotel staff key. For a 4-star hotel, the security is very dangerous. Maybe the housekeeping staff is used to this hotel entering carelessly with the excuse of giving room equipment, etc. without being asked by the guest but unfortunately when I entered my room, I happened to want to enter the room too so I was caught. Even if the guest asked me to deliver room equipment etc., the rule is still not to enter carelessly using a staff key when the guest is not in the room because after the room is checked in, the room is the guest's private area that no one may enter without the permission of the room owner.